Reincarnation into a Patchwork Abomination: "My Class is Alter-Ego."

Imagine, for a moment, you die. This is an unfortunate thing, but you managed to get lucky and draw the lottery ticket of Reincarnation! Woo! Isekai Dreams, right? But, get this, you aren't some Legendary Hero or Cheat-Swordsman, you don't even get a unique skill- You just get some scuffed serf class like "Farmer" or "Writer"... Well doesn't that suck!

Well, it'll be fine. Even if people can already do those things, you can just do it better, so you can make one hell of a killing! Yeah, this'll be a relatively easy life-
*thunk*
*thud*
A journey to live in a world where you're already dead.